Electric dry shaver construction



Dec. 8, 1953 J. STRENG ELECTRIC DRY SHAVER CONSTRUCTION 2 Sheets-Sheet 1 Filed Jan. 4, 1950 INVENTOR JAN STRENG BY 7? ATTORNEY.

Dec. 8, 1953 J. STRENG ELECTRIC DRY SHAVER CONSTRUCTION 2 Sheets-Sheet 2 Filed Jan. 4, 1950 ATTORNEY.

INVEN TOR. JAN STRENG I A: I l/ll Patented Dec. 8, 1953 ELECTRIC DRY SHAVER CONSTRUCTION Jan Streng, Ridgefield, Conn., assignor to Remington Rand 1110., Buffalo, N. Y., a corporation of Delaware Application January 4, 1950, Serial No. 136,670

6 Claims. 1

This invention relates to electric dry shavers and more particularly to important and advantageous features of construction, especially with regard to simplicity of parts, facility in their assembly, and durability and efliciency in their operation.

An important object of the present invention is the provision of a dry shaver having adjacent chambers or compartments isolated from one another, one of which chambers is adapted to receive and house the shaver motor, and the other chamber of which serves the dual purpose of housing the cutter head, or heads, and storing the hair cut by said cutter head or heads.

The invention further comprehends the provision of an improved electric shaver having a, horizontally divided casing preferably formed in two separable sections; improved and simplified means for detachably mounting the cutter head or heads, within the hair storage chamber section of the casing to enable quick removal and insertion of the cutter head or heads for purposes of repair or exchange, and to permit cleaning and sterilization of the cutters when the shaver is used in barber shops or like places patronized by the public; provision of increased storage capacity for hair clippings, thus obviating the necessity for frequent disposal of hair clippings; casing sections which can be economically molded from plastic Or other moldable materials or which may be punched or formed from sheet metal; a shaver construction which provides for improved exterior appearance and reduction of manufacturing costs due to the simplified and streamlined design of the shaver components; and new and novel means for retaining substantially all component parts of the shaver in assembled relation.

The manner in which the above and other objects of the invention are accomplished will be readily understood on reference to the following specification when read in conjunction with the accompanying drawings, wherein:

Fig. 1 is a perspective view of an electric dry shaver embodying the principles of the present invention.

Fig. 2 is a perspective view of the cutter head and mounting plate assembly.

Fig. 3 is a detailed perspective view of the easing section which houses the cutter head assembly and forms a hair receiving and storage chamber.

Fig. 4 is an exploded perspective view showing the shaver motor, the new and novel oscillator for the cutter heads, and the supporting plate for the oscillator, motor and case latching mechanism. I

Fig. 5 is a perspective detailed view of the easing section which houses the shaver motor.

Figs. 6 and? are elevational detailed views of one form of oscillator which may be used for imparting reciprocating motion to the movable cutters of the cutter heads.

Fig. 8 is an enlarged vertical cross section through the cutter head assembly and associated casing section.

Fig. 9 is an enlarged vertical cross section of the cutter head assembly taken on a plane corresponding to the line 3-9 of Fig. 2.

Fig. '10 is a fragmentary perspective view of the casing section'shown in Fig. 3 to better illustrate the interior of said section.

Fig. 11 is a planview of the supporting plate including the case latching mechanism.

Fig. 12 is a longitudinal sectional view of the case latching means taken along the line l2-l2 of Fig. 11.

Fig. 13 is a view of the shaver partly in elevation and partly in vertical section on a plane corresponding to the line l3-l3 of Fig. 1, and

Fig. 14 is a perspective view illustrating a modification of the oscillator and its supporting plate.

Referring now to the drawings for a detailed explanation of the invention, the new and novel dry shaver may be considered as comprising three major components or units, namely, the casing C (Fig. 1), the cutter head assembly H (Fig. 2) and the shaver motor M shown as a, part of the exploded view of Fig. 4. The shaver casing C is dimensioned to conveniently fit in the hand of the user and according to the present invention is preferably formed in two sections designated l and 2. As clearly shown in Figs. 1 and 13, the

sections l and 2 of casing C are joined along the line, such as 3, extending crosswise of the casing in contradistinction to normal devices of this class having the sections joined along a line extending lengthwise of the casing.

For the purpose of description, section I will be considered the lower casing section and section 2 will be considered the upper or head end end to removably receive the motor M. Upper casing section 2, of sle eve -like construction, forms an open-ended chamber 5 within which the cutter head assembly H is detachably mounted in a manner presently described.

Cutter head assembly The cutter head. assembly H will now be described in detail, attention being directed particularly to Figs. 2, 8 and 9. As shown in these figures, 6 indicates a head mounting plate upon which a plurality of cutter heads I may be assembled in unitary or gang fashion, and preferably, but not necessarily, angularly. disposed relative to one another in a manner clearly shown in Figs. 8 and 9 to conform a convex shaving surface. In common with known cutter heads of this class, each head preferably'includes an outer relatively fixed cutter or shearing member 8, within which an inner cutter 9 is reciprocably mounted. Each cutter head "'I is-detachably secured to the head mounting plate 6 in any convenient manner, for example;,by.-screws' ill-which extend through the plate 6 and into threaded holes in the base blocks. I8 of cutter heads 7 in the manner clearly illustrated in Fig. 8.

'To-detachably mount thecutter head assembly H, within the upper casing section 2, two :pairs "of' horizontally disposedspring-pressedpins II are-provided which-project through holes in cars I 2-I2. Theears are formed-integrally-with, and

project downwardly fromythe bottom of plates. The construction is such that the' pins I I are slidably mounted within-short tubes Iii-which "fit between the ears I2 -I'2-as best shown in Figs. 8

I and 9. These pins are normally urged I outwardly against the cars by springs I4 which are also mounted or housed within the tubes I3. vHead mounting'plate 5 has an elongated transverse Him the conventional and well-known manner.

Hair receiving casing section As previously mentioned, casing section 2 serves the dual purposeof housing the cutter headassembly H and storing haircut by thecutter of said head. For a clear understanding of how casing section 2 is formed, and how the cutter head. assembly is detachably mounted therein, attention is directed to Figs. 3', 8, 1'0 and 13respectively. 'As shown in these figures, casing section '2 comprises a sleeve-like -member having side walls 26-29 and end walls"21-2I. Extending inwardly from each side wall 20 is a narrow ledge or shelf'22 provided with a pair off-spaced vshaped'notches 23 for cooperation with the reduced ends of pins I I. It will-be'understood from Fig. 8 that when cutter head assembly H is insorted into casing section 2,'p1ate 6 will seat upon the'ledg'es22 and pins il will snap past'the apex of the V-shaped'notches 23. Thus the'cutter head assembly. is securely but detachably held within said-casing section.

When the cutter heads "'lare disposed :angularlyrelative to one'another (seerFigs. Band 9) it is possiblethat :hair clippings may'escape from the hair .receivingchamber-S- through the spaces 24 (Fig. -9) between the heads during ma nipulation .of the shavers To eliminate this possibility, aplurality .of wedgeeshaped bosses .25 (two of whichclearly show in Fig. .lfliproject inwardly from end walls 2| .of section2.

bosses register with the spaces 24 when the shaver is assembled, and therefore hair clippings are confined within chamber 5 and prevented from escaping through the spaces 24 between the heads "I.

Motor assembly Fig. 5. V'A'pair of brackets or hangers 26-26,

preferably stamped from. sheet metal, are secured tothe laminatedpoles 2I2I of the motor core by screws 28. The upper end of each bracket terminates in a pair ;of out-turned bifurcated legs 29 which are dimensioned to seat upon bosses 3D formed integral with lower casing'section I when-motor M is inserted into said casing=sec- *tion as shown in-Fig. 13. The lower end of each bracket 25 terminates ina plurality of fingers 3|, the endsof which are bent inwardly to support and hold a terminal block 32 said block-being preferably molded from an insulating material and in which is imbedded terminal prongs 33.

The prongs project through a partition 34 molded as'a partof casingsection Land into socket 35 which receives the connecting plug 36 forming partof the current supplying cable 31 commonly used with such devices.

Case latching means Upper casing section 2 is detachably connected to lower casing section I by manually operable latching meanswhich will now be described in detail. -As shown-in Figs. 4, 11 and 12,. the latching means, which comprises a pair of buttons 38-38,::spring 39 and channel member 40, is

mounted-upon a partition'plate 4I dimensioned 2 toholdthe casing sectionstogether. The construction is such that when section 2 is-placed "over section I; and the sections pressed together,

the buttons will be cammed inwardly into channelmember 40, thus compressing spring 39 until the arms 46 snap into notches 41 under the infiuen-ce 0f the spring 39.

Oscillator [Aspreviously mentioned'the inner cutters 9 of cutter head 1 are reciprocated longitudinally withintheir outer fixed cutters 8, by the driving arm I6o'f oscillator I1. One embodiment of the oscillator is shown in Figs/1,6, l and 13 wherein its lower forked end IIais driven by an eccentric cam 48 secured to motor shaft #9 directly behind the conventional knurled starting wheel 59. Anotch 5| (in plate .4 IFig. 11) isprovided to permit the oscillator to extend from: motor These chamberl to hair. receiving chamber 5. .A spit resilient grommet 52,.surrounding the oscillator l1, serves to efiectively seal the notch thereby preventing hair clippings from escaping from hair chamber 5 into motor chamber 4 and without interfering with proper operation or movement of the oscillator when driven by the cam 48. Oscillator I1 is supported for rocking motion relative to plate 4| by a fiat spring 53, one end of which is riveted to a C-shaped bracket 54, the bracket in turn being riveted to plate 4|. On the other end of spring 53 is rigidly secured an L- shaped bracket 55, the latter in turn being rigidly secured to oscillator I! as clearly shown in Fig. 6. A modified construction for the oscillator is shown in Fig. 14. As shown in this view, the'oscillator includes the conventional rocker shaft |53 which is pivotally supported by a pair of ears I54 struck upwardly from the plate I4 I. The openings or notches |5| in plate |4| are closed by suitable flexible grommets (not shown) to prevent passage of hair clippings from hair storage chamber 5 to motor chamber 4. The latching means mounted on plate MI is identical in construction and operation to the latching means described in connection with plate 4| and the corresponding parts are similarly numbered.

Assembly From the foregoing detailed description of the shaver components, it will now be clear that as sembly of the shaver may be quickly and conveniently accomplished as follows:

The motor assembly M is inserted within lower casing section I until the lugs 29 seat upon the bosses 30. A resilient Washer 56 is then placed upon each lug 29 with its hole in aligned relation with the threaded holes 5'! in bosses 3|]. Plate 4!, carrying the latching means and oscillator, is then inserted into recess 42 and secured to lower casing section by screws 58 threaded into the tapped holes 51. Upper casing section 2, carrying the cutter head assembly H, is then placed over section I so that driving arms I6, of oscillator ll, enter apertures H), to engage with the inner cutters 9 as shown in Fig. 13. The casing sections are then firmly pressed together to engage arms 46 of buttons 38 with the notches 41 in upper casing section 2. When the shaver is thus assembled, it will be clear that the lower portion of the knurled starting wheel 5|! may be engaged by the thumb (through opening 59 in section I) to efiect rotation thereof, thus starting the motor in the conventional and well-known manner.

It will now be apparent that upper casing section 2 carrying the cutter head assembly I-I may be quickly and conveniently removed from lower casing section I by merely pressing inwardly upon the buttons 38 to disengage the arms 46 from holding engagement with the notches 4'! in the section 2. Upon removal of the casing section 2 in this manner, the cutter head assembly H may then be quickly detached from section 2 by pressing the thumb upwardly upon the tubes I3 to disengage the pins H from holding engagement with the V-shaped notches 23. This enables the cutter head assembly to be quickly detached in order that it may be sterilized, repaired or exchanged as previously mentioned, and that hair stored within the interior of section 2 and upon the top of plate 4| can be quickly and conveniently removed.

While there have been described and illustrated, specific embodiments of the invention, it will be obvious that various changes and modifications may be made therein without departing from the field of the invention, which should be limited only by the scope of the appended'claims.

The invention claimed is: r

1. In a dry shaver, the combination of an elongated shaver casing comprising upper and lower sections separable from one another in a plane crosswise of the casing; a plate-like member removably secured to the lower section to form separate chambers within the interior of said casing when its sections are united in continuous casing forming relation relative to one another; a motor mounted within the lower of said chambers; a removable cutter head assembly mounted within the upper of said chambers; driving means extending from one to the other of said chambers and operatively connecting the motor with said cutter head assembly; means to effectively seal one chamber from the other to confine hair, cut by said cutter head assembly, within the upper chamber and excluded from the lower chamber; and means carried by said platelike member adapted to detachably hold said sections in said continuous casing forming relation relative to one another.

2. In a dry shaver construction as specified in claim 1 wherein the holding means carried by said plate-like member to detachably hold said casing sections in continuous casing forming relation relative to one another includes a pair of spring pressed buttons each of which have arms adapted to engage with notches formed in the upper casing section.

3. A dry shaver construction comprising the combination of a shaver casing divided horizontally to provide two separable sections each of which forms a chamber; a cutter head assembly received by and detachably mounted within the upper casing section; a motor assembly removably mounted in the lower casing section; a horizontal plate disposed between said sections to isolate the upper chamber from the lower chamber, said plate being removably connected with said lower casing section; driven means connecting said motor assembly with said cutter head assembly, including an oscillator arm pivotally mounted upon said plate; and manually operable latching means mounted upon said plate and engageable with said upper casing section to detachably hold it in continuous casing forming relation relative to said lower casing section.

4. In a dry shaver construction as specified in claim 3 wherein the cutter head assembly includes a mounting plate; a plurality of open ended cutters removably attached to the upper surface of said plate; and spring detents carried by the plate for engagement with notches within the upper casing section.

5. In a dry shaver of the character described, the combination of a casing divided horizontally to provide upper and lower casing sections each of which has a chamber formed therein; a horizontally disposed plate fixed to the lower casing section to isolate the chambers from one another; a motor mounted in the lower chamber; a cutter head assembly, including movable cutters, mounted in the upper chamber; an oscillator driven by said motor to impart reciprocating motion to the movable cutters, said oscillator being pivotally mounted through a flat spring attached to said plate; and detent means including a pair of depressible buttons mounted on said plate and serving to normally hold said casing sections in continuous casing forming relation relative to one another.

6. A dry shaver of the type described compris- 1 1% "means on "the abutting edges'jof saidsections a warm partition defining upper-and lower chambers within said casing; a motormounted Within-said "lowerchamber; a removable "cutter head assemblymountod within said upper chamber; driving means extending from'the lower to the upper of said chambers for operatively connecting said motor with said cutter head assembly including an oscillator arm mounted.- uponsaidpartition'for rocking movement; and latching means carried by vsaid partition to detachablyretain said set:-

'tionsin continuous casin'g'forming relation relative't'oone another.

JAN STRENG.

References Cited m me m of this patent Number Apr."29;'1941 

